EP 0772953 A4 20021113 - PIEZO SPEAKER AND INSTALLATION METHOD FOR LAPTOP PERSONAL COMPUTER AND OTHER MULTIMEDIA APPLICATIONS
Title (en)
PIEZO SPEAKER AND INSTALLATION METHOD FOR LAPTOP PERSONAL COMPUTER AND OTHER MULTIMEDIA APPLICATIONS
Title (de)
PIEZOLAUTSPRECHER UND EINBAUVERFAHREN FÜR TRAGBAREN PERSONALCOMPUTER UND ANDERE MULTIMEDIAANWENDUNGEN
Title (fr)
HAUT-PARLEUR PIEZO-ELECTRIQUE ET SON PROCEDE D'INSTALLATION POUR ORDINATEUR PERSONNEL PORTATIF ET AUTRES APPLICATIONS MULTIMEDIA
Publication
Application
Priority
- US 26721894 A 19940706
- US 9508131 W 19950629
Abstract (en)
[origin: WO9601547A2] This application outlines several applications of a piezoelectric materials invention to produce quality loudspeakers in applications where coil driven dynamic speakers are difficult or impossible to implement with an appreciable degree of sound quality. This invention includes a series of modifications to a laptop computer such as the IBM 750c. The modifications to the computer consist of placing piezoelectric patches behind the LCD and directly to the back wall of the laptop lid. Damping materials and stiffeners are also added to the back wall to reduce structural resonance. A system consisting of an audio amplifier and transformer is used to drive the piezo speaker.
IPC 1-7
H04R 17/00; H04R 17/02; H04R 17/06; H04R 3/00; G05B 23/02; G06F 1/16
IPC 8 full level
G06F 1/16 (2006.01); H04R 17/00 (2006.01); H04R 7/04 (2006.01)
CPC (source: EP US)
G06F 1/1616 (2013.01 - EP US); G06F 1/1632 (2013.01 - EP US); G06F 1/1688 (2013.01 - EP US); H04R 17/00 (2013.01 - EP US); H04R 7/04 (2013.01 - EP US)
Citation (search report)
- [Y] EP 0510814 A1 19921028 - SEIKO EPSON CORP [JP]
- [YA] US 4439640 A 19840327 - TAKAYA TADASHI [JP]
- [A] US 5214514 A 19930525 - HABERKERN OTTMAR [DE]
- [X] US 5031222 A 19910709 - TAKAYA TADASHI [JP]
- [A] US 5115472 A 19920519 - PARK KYUNG T [US], et al
- [A] US 4249037 A 19810203 - DEXTER JOHN L
- [A] US 4179585 A 19791218 - HERRENSCHMIDT GILLES R [FR]
- [A] US 4816743 A 19890328 - HARMS KLAUS-CHRISTOPH [AT], et al
- See references of WO 9601547A2
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE
DOCDB simple family (publication)
WO 9601547 A2 19960118; WO 9601547 A3 19960222; CA 2194266 A1 19960118; CA 2194266 C 20010403; EP 0772953 A2 19970514; EP 0772953 A4 20021113; US 5638456 A 19970610
DOCDB simple family (application)
US 9508131 W 19950629; CA 2194266 A 19950629; EP 95924733 A 19950629; US 26721894 A 19940706